CN101408125B

CN101408125B - Exhaust manifold assembly

Info

Publication number: CN101408125B
Application number: CN2008101692517A
Authority: CN
Inventors: K·L·马罗塔; R·H·贝克
Original assignee: GM Global Technology Operations LLC
Current assignee: GM Global Technology Operations LLC
Priority date: 2007-10-10
Filing date: 2008-10-10
Publication date: 2012-06-13
Anticipated expiration: 2028-10-10
Also published as: CN101408125A; DE102008050623A1; DE102008050623B4; US7975473B2; US20090094969A1

Abstract

The present invention relates to an exhaust manifold may include a manifold body and a flange. The manifold body may include a first tube that forms an exhaust gas inlet. The flange may be coupled to the manifold body and may fix the manifold body to an engine. The flange may include a first aperture having first and second portions located along an axial extent of the first aperture. The first portion may extend to a first end surface of the flange and the second portion may extend to a second end surface of the flange. The first portion may have a first radial width that is less than a second radial width of the second portion. The second portion may receive an end of the first tube therein. The first tube may be fixed to the flange at a location within the first aperture between the first portion and the second end surface.

Description

Exhaust manifold assembly

Technical field

This disclosure relates to gas exhaust manifold, and the installation that relates more specifically to gas exhaust manifold is with the joint between flange and the manifold body.

Background technique

The statement of this part only provides the background information relevant with this disclosure, and possibly not constitute existing technology.

Engine pack generally includes the gas exhaust manifold that is connected to motor, with from its directing exhaust gas gas flow.Gas exhaust manifold comprises the manifold body that is fixed on the flange, and said flange is connected to motor with gas exhaust manifold.Manifold body is welded to flange at its end surfaces place usually, and said end surfaces is usually in abutting connection with motor after assembling.Manifold body and flange are processed by similar material usually, to solve the thermal expansion of experiencing during the welding process.

Summary of the invention

A kind of gas exhaust manifold comprises manifold body and flange.Said manifold body comprises first pipeline that forms the exhaust gas inlet.Said flange is connected to said manifold body, and said manifold body is fixed to motor and said manifold body is set to be communicated with exhaust gas from said motor.Said flange comprises first hole, and said first hole has along first and second parts of the axial range location in said first hole.Said first portion extends to first end surfaces of said flange, and said second portion extends to second end surfaces of said flange.Said first portion has first radial width less than second radial width of said second portion.Said second portion is received in the end of said first pipeline wherein.Said first pipeline position between said first portion and said second end surfaces in said first hole is fixed to said flange.

A kind of method comprises that the end of first pipeline that the exhaust gas inlet of gas exhaust manifold is led in formation is inserted in first hole of flange, and said flange is installed to motor with said gas exhaust manifold.Said first hole has along first and second parts of the axial range location in said first hole.Said first portion extends to first end surfaces of said flange, and said second portion extends to second end surfaces of said flange.Said first portion has first radial width less than second radial width of said second portion.Said method also comprises position between said first portion and said second end surfaces in said first hole, said end is axially aligned; With the internal surface that the said end of said first pipeline is fixed to said first hole.

Further application area is obvious in the explanation that provides thus.To it will be appreciated that said explanation and concrete example just in order explaining, and not plan to limit the scope of this disclosure.

Description of drawings

Accompanying drawing described here is just in order to explain, and the scope of not planning to limit by any way this disclosure.

Fig. 1 is the schematic representation according to the engine pack of this disclosure;

Fig. 2 is the perspective view according to the gas exhaust manifold of this disclosure;

Fig. 3 is the partial cross section figure of the gas exhaust manifold of Fig. 2;

Fig. 4 is the part plan view of end of pipeline of the gas exhaust manifold of Fig. 2; With

Fig. 5 is the worm's eye view of flange of the gas exhaust manifold of Fig. 2.

Embodiment

Following description in fact only is schematically, rather than limits this disclosure, its application or use.Should be appreciated that corresponding reference character runs through accompanying drawing and representes identical or corresponding parts and characteristic.

Referring to Fig. 1, schematically show exemplary engine assembly 10.Engine pack 10 comprises motor 12, and motor 12 is communicated with gas handling system 14, vent systems 16 and fuel system 18.In the example shown, gas handling system 14 comprises intake manifold 20 and closure 22.Yet, should be appreciated that alternative application possibly not comprise closure 22.Closure 22 controls get into the air mass flow (by arrow 23 expressions) of motor 12, and fuel system 18 controls get into the fuel flow rate of motor 12.Vent systems 16 comprises gas exhaust manifold 24, and gas exhaust manifold 24 is fixed to motor 12 and is communicated with the exhaust gas of air/fuel mixture burning generation.Gas exhaust manifold 24 is from motor 12 directing exhaust gas gas flow (by arrow 25 expressions).

Referring to Fig. 2, gas exhaust manifold 24 comprises manifold body 26 and flange 28.Manifold body 26 includes but not limited to have a succession of

pipeline

30,32,34,36 of the sheath 38 that is fixed to the

upper.Pipeline

30,32,34,36 can be relative to each other fixing through engaging with sheath 38.More specifically, each

pipeline

30,32,34,36 can be soldered to sheath 38.

Pipeline

30,32,34,36 are processed by various materials, comprise steel, as forging low-carbon (LC) and

stainless steel.End

40,42,44, the 46 extensible sheaths 38 that exceed of each

pipeline

30,32,34,36.Because manufacturing variation,

end

40,42,44,46 exceed sheath 38 scope at

pipeline

30,32, maybe be different between 34,36.

Flange 28 can for example be processed from powdered metal.In this example,

pipeline

30,32,34,36 can process from material different with flange 28.Thereby,

pipeline

30,32,34,36 can have the thermal expansion coefficient different with flange 28.The powdered metal of flange 28 has 6.8g/cm at least ³ Density.Flange 28 can be included in a succession of

hole

48,50,52,54 of extending between its first and second end surfaces 56,58.First end surfaces 56 can be to be used for the fitting surface that engages with motor 12.Referring to Fig. 3, will describe hole 48 in addition, be to be understood that said description will be equally applicable to

hole

50,52,54.Hole 48 comprises that first and second parts, 60,62, first and

second parts

60,62 have stepped 64 between them.

First portion 60 extends to first end surfaces 56, and second portion 62 extends to second end surfaces 58.First portion 60 has the radial width less than the radial width of second portion 62.More specifically, in addition referring to Fig. 5, second portion 62 extends radially outwardly with respect to first portion 60, and have big and minor diameter greater than first portion 60 (D3, D4) greatly and minor diameter (D1, D2).

Stepped 64 is extended with respect to the longitudinal axis in hole 48 at a certain angle.For example, stepped 64 is extended with the angle (θ) between 10 and 90 degree.Alternatively, stepped 64 is extended with the angle between 90 and 135 degree, so that the recess of sealing substantially to be provided.Stepped 64 is positioned at from first end surfaces, 56 distances to be located for the distance (x) between the 25-75% of the axial range (y) in hole 48.More specifically, stepped 64 is positioned at about midpoint of the axial range (y) in hole 48.The end 40 of pipeline 30 extends to the position between first end surfaces 56 and second end surfaces 58 in the hole 48.For example, the end face 41 of end 40 can first portion 60 and second end surfaces 58 axially between.The description that should be appreciated that pipeline 30 and hole 48 is equally applicable to

pipeline

32,34,36 with

hole

50,52,54.

Referring to Fig. 4, the end face 41 of pipeline 30 has less than D1 greater than the major diameter (D5) of D3 in addition.The end face 41 of pipeline 30 has less than D2 greater than the minor diameter (D6) of D4.Thereby stepped 64 extends axially the end 40 that strides across pipeline 30.Recess 66 can form between the end 40 of first portion 60 and pipeline 30, and has the axial range that is limited end face 41 and stepped 64.Recess 66 extends radially outwardly with respect to the internal surface at 40 places, pipeline 30 ends and the first portion 60 in hole 48.The radially outward scope of recess 66 with respect to first portion 60 between 0.5mm and 4.0mm.Recess 66 can be positioned at from first end surfaces, 56 distances locates (referring to Fig. 3) for the distance (x) between the 25-75% of the axial range (y) in hole 48.More specifically, recess 66 is positioned at about midpoint of the axial range (y) in hole 48.

The position of the end 40 of pipeline 30 between first and

second end surfaces

56,58 is fixed to the inwall in hole 48.For example, the position of the end 40 of pipeline 30 between the first portion 60 and second end surfaces 58 is fixed to flange 28, more specifically, and at recess 66 places.Since pipeline 30 between first and

second end surfaces

56,58 the position rather than be fixed in the hole 48 at first end surfaces, 56 places, the axial range of pipeline 30 in hole 48 can change, and the machine operations that need not add.For example,

pipeline

30,32, in 34,36 at least two have different axial ranges in the hole in 48,50,52,54.

Pipeline

30,32, one in 34,36 has than

pipeline

30,32, and another in 34,36 be greatly up to the axial range of 2.0mm, and more specifically, than

pipeline

30,32, another in 34,36 is between big 1.0 to 2.0mm.

Pipeline 30 is fixed to flange 28 by welding bead 68.Soldering tip is inserted in the hole 48 and in recess 66, uses welding bead 68.The angular range of above-mentioned stepped 64 is beneficial to the insertion of soldering tip usually to be used for welding operation.Welding bead 68 has the 60 radially inner scopes with respect to first portion, promptly for example is less than or equal to 1mm.Thereby, the flow restriction that welding bead 68 provides seldom in hole 48 or do not have to add.Near the position at the point midway place of the axial range in hole 48 warpage of restriction first end surfaces 56 usually, said warpage is caused by the heat that weld period produces welding bead 68 usually in recess 66.More specifically, the warpage of first end surfaces 56 is usually less than on first end surfaces 56, directly welding the warpage that causes.The mach quantity of needs on first end surfaces 56 can got rid of or reduce to the warpage that reduces.

Claims

1. gas exhaust manifold comprises:

Manifold body, said manifold body comprise first pipeline that forms the exhaust gas inlet; With

Flange; Said flange is connected to said manifold body; And said manifold body is fixed to motor and said manifold body to be set to be communicated with exhaust gas from said motor; Said flange comprises first hole, and said first hole has along first and second parts of the axial range location in said first hole, and said first portion extends to first end surfaces of said flange; Said second portion extends to second end surfaces of said flange; Said first portion has first radial width less than second radial width of said second portion, and said second portion is received in the end of said first pipeline wherein, and said first pipeline position between said first portion and said second end surfaces in said first hole is fixed to said flange.

2. gas exhaust manifold according to claim 1 is characterized in that also comprising welding bead, and said welding bead is positioned on the internal surface in said first hole and the said end of said first pipeline is fixed to said flange.

3. gas exhaust manifold according to claim 2 is characterized in that, between the said first portion in the said end of said first pipeline and said first hole, limits recess, and said recess makes said welding bead be arranged in wherein.

4. gas exhaust manifold according to claim 3 is characterized in that, said welding bead extend radially inwardly exceed said first portion internal surface less than 1mm.

5. gas exhaust manifold according to claim 2 is characterized in that, said welding bead is positioned at about axial midpoint place in said first hole.

6. gas exhaust manifold according to claim 1 is characterized in that, the said end of said first pipeline comprises the 3rd radial width greater than said first radial width.

7. gas exhaust manifold according to claim 6 is characterized in that, the said end and the said first portion of said first pipeline limit recess between them.

8. gas exhaust manifold according to claim 1 is characterized in that, said flange comprises the stepped between said first and second parts.

9. gas exhaust manifold according to claim 8 is characterized in that, said stepped is extended with the angle between 10 and 90 degree with respect to the longitudinal axis in said first hole.

10. gas exhaust manifold according to claim 8 is characterized in that, said stepped radially extends across the said end of said first pipeline.

11. gas exhaust manifold according to claim 8; It is characterized in that said manifold body comprises second pipeline, said flange comprises second hole; Said second hole has first and second parts along its axial range; Additional stepped is between first and second parts, and said second pipeline forms additional exhaust gas inlet, and in said second hole, has the axial range greater than the axial range of said first pipeline in said first hole.

12. gas exhaust manifold according to claim 1 is characterized in that, said first pipeline is processed from different materials with said flange.

13. gas exhaust manifold according to claim 12 is characterized in that, said flange is processed from powdered metal.

14. a method comprises:

The end of first pipeline of formation being led to the exhaust gas inlet of gas exhaust manifold is inserted in first hole of flange; Said flange is installed to motor with said gas exhaust manifold; Said first hole has along first and second parts of the axial range location in said first hole; Said first portion extends to first end surfaces of said flange; Said second portion extends to second end surfaces of said flange, and said first portion has first radial width less than second radial width of said second portion;

Position between said first portion and said second end surfaces in said first hole, said end is axially aligned; With

The said end of said first pipeline is fixed to the internal surface in said first hole.

15. method according to claim 14 is characterized in that, saidly fixedly comprises welding.

16. method according to claim 15 is characterized in that, said welding is included in that the about axial midpoint place in said first hole forms welding bead on the said internal surface in said first hole.

17. method according to claim 14 is characterized in that, said first hole comprises the stepped between said first and second parts, between the said said end that is aligned in said first portion and said first pipeline recess is provided.

18. method according to claim 17 is characterized in that, said fixedly being included in forms welding bead in the said recess.

19. method according to claim 18 is characterized in that, insert said recess to form said welding bead with soldering tip said fixedly comprising.

20. method according to claim 14 is characterized in that also comprising from powdered metal and processes said flange.